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I don't have an answer for your problem, but I'll be reading the info because mine wouldn't start today either. Cranks over, almost starts, puffs a bit of smoke and then just turns over. Wait awhile and crank it again it almost starts but then back to cranking again. Just had it towed to the Ford truck service center to find out how much this will cost. I am just about at the end of my patience with this 6.0L it's been on the hook one too many times. Looking at the 6.2L for the next one.
Not sure why you didn't get responses when you posted this (maybe if you had started a new thread on it), but a scangaugeII would have had a good chance at identifying the bad FICM and $350 later Ed at FICMrepair.com would have had you better than new.
I do think a scantool is an important thing for us 6.0L folks to own!
scan tool seems to be a good investment.I have used mine several times while on the road.Got the info. and then called the dealer to see if it was safe to drive.
I cheched them both. They were in sync. I still replaced them both. Two new batteries and a new starter. It sounds about like it always did spinning over. Can it lose oil pressure after the sensor not opening the inj? plugs in head oposite the branch connection. I am going to manually check fuel pressure.